Brake-controlling mechanism for looms.



H. A. DAVIS. BRAKE GONTEOLLING MECHANISM FOR LOOMS. APPLIUATION FILED MAY 31, 1906.

908,212. Patented Dec. 29, 1908.

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UNITED sTATEs PATENT OFFICE.

HARRY A. DAVIS, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF

HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

BRAKE-CONTROLLING MECHANISM FOR LOOMS.

Specification of Letters Patent.

Application filed May 31, 1.906.

Patented Dec. 29, 1908.

Serial No. 319,563.

T 0 all whom it may concern:

Be it known that I, HARRY A. DAvIs, of Hopedale, in the county of \Vorcester and State of Massachusetts, have invented certain new and useful Tmproi' ements in Brake-Controlling Mechanism for Looms, of which the following is a specification.

When a loom is stopped automatically as the resultof any contingency which if not corrected might result in an imperfection in the fabric, it is customary to hasten the stoppage of the loom by the employment of a brake. After the loom has been stopped it is frequently desirable to move the weaving mechanism of the loom in order that the possible defect may be more conveniently attended to; in order that the lay may be moved all the way back before the loom is re-started so that on restarting it may acquire full speed before the first pick of the shuttle, and, also, that the shed may be wide open and in order that the shedding mechanism may be restored to position so that the next weft laid may be in the proper shed in the case of weaving fabrics where the preservation of the sequence of shed formation is important. In all such cases it is desirable to remove the braking pressure so that the weaving mechanism may be readily moved by hand. At the same time it is important that the braking mechanism having thus been rendered inoperative should be restored to position ready to be operated automatically when the loom again stops without requiring any attention on the part of the weaver.

The present invention relates to mechanism for controlling the application of the braking pressure in stopping the loom, and for relieving the braking pressure after the loom has been stopped and in such manner that no further attention need be given to this mechanism, since the restarting of the loom automatically places this mechanism in operative condition.

The present improvements are illustrated in the accompanying drawings, in which Figure 1 is a plan view of the breast beam at the setting on side of the loom, a portion of the mechanism being shown in section. Fig. 2 is a vertical section through the breast beam extension. Fig. 3 is a front view of the parts shown in Figs. 1 and 2.

A is the breast beam having, as usual, an

extension B, with a slot C and holding notch D for the setting on or shipper handle E. At F is shown a knock-off lever pivoted at G to the breast beam. When the outer end of this knock-off lever is swung toward the shipper handle said handle is released from its holding notch D and then moves outwardly along the slot C through the action of a suitable spring (frequently in the metal of the handle itself) and such shipper handle is connected in any ordinary or known way with the stopping mechanism so as to automatically disconnect the loom from its driver. Such mechanism is so well known as not to require specific illustration or description. The knock-0E lever F is simply representative of many means which can be employed to act upon the shipper handle to release it from its holding notch, the knockoff lever shown being one which is commonly employed as a part of connecting mechanism between a weft fork and the shipper handle to stop the loom in case the weft fork detects objectionable absence of weft. The stopping may be effected by any other contingency which occurs in the running of a loom making it desirable to stop the loom. It is also very common in looms to apply a brake as the result of the described movement of the shipper. handle. One such mechanism is here illustrated so far as necessary for an understanding of the present improvement. The shipper handle has a forwardly projecting lug I which extends beneath a cam shaped surface on the under side of a brake controller J pivoted at K to the breast beam extension B. This brake controller is normally held in an elevated position by its lowest portion resting on the lug I, as shown in Fig. 3. This brake controller can be connected to the brake in any suitable manner. There is shown a depending rod L hanging down from the brake controller. This rod is a part of the intervening connections between the controller and the brake and is suflicient to indicate the braking mechanism. Ordinarily either a Weight or a spring pulls down directly or indirectly upon this rod. When the shipper handle is unlocked and moves outwardly along the slot 0 the brake controller J loses the support of the lug I on its lowest part and accordingly drops down to a lower position sufficiently far to enable the brake to be the inner end of the bolt N.

N which is pressed toward the breast beam extension by a spring 0. During the running of the loom the inner end of this bolt is in front of the breast beam entension, as illustrated in Fig. 1, so that the brake c011- troller is free to move down when the brake is to be applied. The knock-off lever F lies between the bolt and the shipper handle when the shipper handle occupies the holder notch D, as also illustrated in Fig. 1. lVhen, however, the loom is stopped the shipper handle no longer occupies the notch D and the knock-off lever F no longer obstructs Consequently when the handle M is lifted sufi'iciently high the bolt N automatically springs backwardly above the top of the breast beam extension B. Then when the weaver releases the handle the brake controller is held lifted with the brake off and hence the weaver can move the weaving mechanism as desired. The breast beam extension B constitutes a retainer for the brake controller to hold the same uplifted with the brake off.

No further attention to the brake controller is necessary on the part of the weaver. Then the shipper handle is restored to its holding notch D for the purpose of restarting the loom, it swings the knock-01f lever F forward, thereby pressing forward the spring bolt N and forcing it ofi from its retainer so that the brake controller then falls down until again supported on the shipper handle lug I, ready to apply the brake when the loom next stops. After controller J, has dropped to rest upon lugI, bolt N, can not snap back over the retainer B, until again lifted by the weaver.

I claim 1. A loom having, in combination, a shipper handle, a knock-ofi' lever, a brake controller, a retainer therefor, a handle on the brake controller, and a locking bolt for the controller which engages said retainer when the brake controller is lifted by hand, said locking bolt being then in the path of the knock-off lever so that when the shipper handle is reset to start the loom the movement of the knock-01f lever thereby imparted releases the locking bolt from the retainer and the brake controller thereupon resumes its position ready to apply the brake when the loom next stops.

2. A loom having a shipper handle, a brake controller, a retainer therefor, and a locking bolt for the controller which automatically connects said retainer and brake controller when said controller is lifted by hand, and said locking bolt being moved to automatically disconnect the retainer and controller when the shipper handle is reset to start the loom owing to the cooperative relation between the bolt and shipper handle.

In witness whereof, I have hereunto signed my name in the. presence of two subscribing witnesses.

HARRY A. DAVIS.

\Vitnesses:

CLARE H. DRAPER, FRANK J. DUTOI-IER. 

